Abstract: At high temperature, porous carbon can be easily oxidized, which limits its industrial applications in catalysis . In this paper, in order to increase the antioxidative ability of porous carbon, boron in solid state was added to porous carbon by KOH chemical activation. It has been proved that the antioxidative ability of porous carbon can be effectively increased by borondoping, because the quantity of active sites on the surface of porous carbon gradually reduced after the heat treatment, inhibiting the reaction between the oxidative gas and the porous carbon. When the content of borondoping is 10% in the porous carbon and the content of B4C is 25% in the borondoping， the relative weight loss of the porous carbon decreased from about 70% to about 20%, the surface area of the porous carbon decreased 10%～20%, Microreactive activation of the porous carbon still remained at 70.25 after 5h, borondoping treatment, comparing to the raw material at 600℃.